/*
 * Alloy Analyzer
 * Copyright (c) 2002 Massachusetts Institute of Technology
 *
 * The Alloy Analyzer is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * The Alloy Analyzer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with the Alloy Analyzer; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package alloy.gui;

import java.awt.Color;
import java.awt.Component;

import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;

/** Cell renderer for displaying tooltips over the Swing representation of the AST.
    @see SwingASTVisitor
    @see NodeInfo */
class SwingASTRenderer extends DefaultTreeCellRenderer {

    public Component getTreeCellRendererComponent(
                        JTree tree,
                        Object value,
                        boolean sel,
                        boolean expanded,
                        boolean leaf,
                        int row,
                        boolean hasFocus) {

        super.getTreeCellRendererComponent(
                        tree, value, sel,
                        expanded, leaf, row,
                        hasFocus);
	DefaultMutableTreeNode treeNode = (DefaultMutableTreeNode)value;
	if (treeNode.getUserObject() != null &&
	    treeNode.getUserObject() instanceof NodeInfo) {
	    NodeInfo nodeInfo = (NodeInfo)treeNode.getUserObject();
	    setToolTipText(nodeInfo.getToolTipText());
	    if (nodeInfo.isFalse())
		setForeground(Color.red);
	}

        return this;
    }
}
